Sack-cleaning device.



A. G. CARLSON. SACK CLEANING DEVICE. APPLICATION FILED OCT- 2I, I915 Patented Feb.29,191 6.

2 SHEETS-SHEET] A. G. CARLSON.

SACK CLEANING DEVICE. APPLICATION FILED car. 21. 19-15.

Patented Feb. 29, 1916.

2 SHEETS-SHhET 2.

.. CARLSGN, or

m 11:11am

Application filed October 2 T 0 all whom it. may concern.

Be it known that l, ilnonrn G. CAnLsoX, a citizen of the lfnited States. and resident of Chicago, in the count of Cool; and State of Illinois, have invented certain new and useful Improvements in Sack-Cleaning Devices, of which the following is'a specification.

My invention relates to dust separating devices and has particular reference to a novel sack cleaning apparatus designed particularly for use in cement mills.

In the manufacture of cement it is common to require the return of the sacks in which the cement is shipped, then to utilize the sacks for further shipments of cement. However, these sacks, when returned, usually contain more or less cement. sometimes in the form oi hardened ltlil'l} )S or particles. the presence of which in cement would he deleterious. It is, tht more, desirable to re move the dust from t-hin order that they may be t lled wit 1 material which contains no deleterious subs ince.

l have conceived that the dust may be remo ed from the seen in a simple one economical manner and without materially injuring'the sacks, and the present apparatus is designed with that object in view.

The invention will be more readily understood by" reference to the accompanying drawings, wherein Figure 1 is a side eleva ion, oartlv in section, showing the appara which I contemplate employing in the 'tU'R'IiiOH of dust from cement sacks; Fig 2 a section on the line 2-42 oi Fig. 1; ig. E3 is a section on the i line 33 of Fig. 1; Fig. tional elevation of t and Fig. 5 is a section Fig. 1.

Referring more particuh il to the draw-- ings, it wi l be that I provide the following jnstrumentalities: First, a feeding and counting incclanism; second. a vibrating or beating mechanism: third, a mechanism for separating the dust from the sacks and delivering the sacks out of the path of the dust; fourth. a suction tan. and fifth, a dust separator ot' an approved form.

The feeding mechanism may comprise an endless convever 10, on which a sack is laid and by means oi which the sack is carried between two pairs of rolls 11. 12. Any lumps of cement which may be contained in the such are ci'ushcd h) thcse roll and the l is an enlarged sect'eedmg mechanism. on the line of Specification of Let Eat-ant.

- upper end 3t.

1915. Serial No. 57,096.

cement may be more readily removed theretroin. After passing out of the grasp of the pair or crushing rolls the sack falls into a hopper at the lower "1d which a grid it is pivot-ed, the grid being held in I the position shown in Fig. l by'means of the coiled spring 15. The passage of the air through the hopper, as induced by the fan, 1S momentarily interrupted by the sack which lies on the grid, whereupon the grid is rocked by the suction of the air and the sack pulled into the heating or cleaning "ice. A link connects thegrid to a C61. .ting device 17, best shown in Fig. l, the counting der'iJc being actuated each time a sack is drawn into the cleaning device.

The cleaning device comprises a casing arranged in the present instance in the form oi. three vertic-ai legs 18, i9, 20. connected at n ends and provided intro 'th corrugated metal guides bent to do a tortuous passage. its the sack is wn forcibly through the cleaner. -it-is jeciicd against the corrugations and connumerous angularities of the. passage, the eiicct of beat'og the sack being secured thereby. J

After leaving the last vertinl leg 20 of' the cleaning device, the sack and the dust pass to the goose neck 22 into the separating device, best shown in Figs. land 2, i which comprises a double conical casing plurality of rods 2- closely disposed in=circular outline, the space inclosed by the rods.

being of substantiallythe diameter of the conduit These rods extend downward in the casing 23 intoan inner truncated conical hopper at the lower end of which is mounted a pair of feeding-out rolls 26. 27.

the roll 26 being resiliently mounted to per niit the )assage of the bags between the rolls. tl e dges oi the rolls it provide an apron prevents the entrance of air at that point. At the lower end of the cas ing "2 :3 1 provide an outlet pipe 29, which communicates directlv with the exhaust fan 30. A. pipe 3i connects the exhaust fan with 1 dust separator which may he of any approved form. in the form shown, the

cement which is separated from the sack is discharged out of the lower end of the separator. while the air is blown out of the A source of power, indicated at 35. provides means for the operation of the fan and the feeding-out ro r15 thereof of simple construction and requires but a.

The operationis as follows A bag, indicated at 36' inFig. t, is placed-n the con veyer', is fed between the rolls'll, 12, and any hard particles crushed, whereupon the bag falls upon the grid 14 and ispulled into the cleaning,devi ce by the exhaust fan. As

the sack passes'through the cleaner it"is beaten'against the corrugated and angular sides thereof; and the dust loosened from the sack, the dust and the sack being'can;

ried in the current of air, to the sack separating device, t which point the air and, the dust whic is carried 1n suspension passes-out to the exhaust fan, while the sack 1s project'edin a straight line past the rods 2%, into the. feeding-out rolls".

A cleaning device, such. as illustrated, is

small amoupt ofpower for its operation. Thereare no parts'whic'h readily become out of order and it requiresbut slight attention other than to the extent of feeding the bags into. the machine. g

' It isobvious that many'm'odifications may be made in the construction shown, and such modifications 'as' are Within the s'c 0pe,0f my claims I consider Within the spirit of myv invention.

I claim-r;

1 In a sack cleaning device, the combination of a casingproviding: a tortuous 'pas-.

sage,'means for feeding a sack into one end of said-passage, means for inducing a current' of air I through said passage, whereby' said sack is drawn bodily tl-rrough the casing, and means for separating the sack from the current of airfsubstanti'ally as described.

l 2. In a device of the class descrlbed, the combination of a cas ngpro idlng apassage-of angular outline, a plurality of.

rounded projections into said passage, means for inducing a current of air through said passage, and means for separating the device to be cleaned from the ,air and the material removed-from the device, substantially asdescribed. t 3.'In a sack cleanlng device, the combi- -i1ati9n of a plurality nation of a casing providing-a 'tdrtuous pasing corrugated, thereby-providing a multitude of rdunded pro ections against which the sack sfitorce-d 1n its'passage through the casing, and means for separating the sacks and the dust, said means-including mechanism whereby the sack is-caused to travelforward in a straight line, whiletthe dustand air'are deflected" at an angle; and meansfor inducing a current of airthrough said' casing, substantially as, described.

1.111 a sack cleanin devic'e, t'he combijoiu'ed at theirends, said, casing being lined '-with a corrugated material and shaped to: provide 'a .tortuous passage, means'for 111-.

ducing a current of air through said passage, and means-for separating a sack from thecurrent oi air and the dust carried there by, said means including a casing which is flared at one point a'n'd 'a series otrods in the flared portion of saidcasing, said'rods serving-to guide sa d sack n a straight llne, the a1r and dust being taken oil; at an angle to the line of travel of thesack, and feedingv out rolls by means of which the separating device is sealed andtlie'sack. fed out therei from, substantially as described. a

5; In 'asack cleaning device, the combination of a casingy'a plurality of lateral projection's into said casin means for generating a current of-air through saidcasing, \i'hereby a sack is carried therethrouglnand separating means whereby the sack and the dust removed therefrom are separated said separating means including a casing haying an axial inletand outlet and an angularly disposed outlet, and sack guiding means located in the line of the axial inlet and outlet, substantially as described.

Signed at Chicago, Illinois, this 18th day of October, D, 1915.

ADOLPH G. CARLSON.

Vitnesses: r

'T. D. BUTLER,

C; Jscons.

bf vertical conduits sage, the-material composing the casing be} 

